天然气预重整固体氧化物燃料电池性能模拟

Performance Simulation of Natural Gas Pre-reforming Solid Oxide Fuel Cell

建立了预重整器和直接内部重整固体氧化物燃料电池电堆的数学模型,验证了电堆模型的有效性。应用Matlab软件实现了对天然气预重整固体氧化物燃料电池的模拟,对重整温度、重整耗热量和重整氢气产生量进行了研究,重整器的最佳操作温度为800℃。通过对部分预重整比率与燃料电池电堆性能关系的研究,建议在直接内部重整燃料电池材料允许的条件下,采用较低的预重整比率。部分预重整与直接内部重整固体氧化物燃料电池的良好结合有利于提高整个燃料电池系统的性能。

The mathematical model for pre-reformer and direct internal reforming solid oxide fuel cell （DIR-SOFC） stack is established, and the validity of the cell stack is verified. The simulation of natural gas pre-reforming solid oxide fuel cell is realized using Matlab software. The reforming tempera-ture, reforming heat consumption and reforming hydrogen production are studied, and the optimal operation temperature of reformer is 800℃. Through research on the performance relationship between the partial pre-reforming ratio and the fuel cell stack, it is suggested that the lower pre-reforming ratio is adopted under the conditions permitted by DIR-SOFC materials. The favorable combination of the partial pre-reforming and DIR-SOFC helps to improve the performance of total fuel cell system.